Pectinodonta borealis Nakrem 2017, sp. nov.
? Pectinodonta borealis sp. nov. (Fig. 3D–H) 2015 Acmaeidae gen. et sp. indet.; Hryniewicz et al. 2015a, table 1. Diagnosis: Surface covered with thick commarginal ribs. Aperture elongated, oval. Apex slightly subcentral. Holotype: PMO 217.516, H = 1.8 mm, L = 4.1 mm, W = 3.3 mm. Type locality and a...
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ftzenodo:oai:zenodo.org:6009541 2023-05-15T18:15:06+02:00 Pectinodonta borealis Nakrem 2017, sp. nov. Nakrem, Hans Arne 2017-10-06 https://zenodo.org/record/6009541 https://doi.org/10.5281/zenodo.6009541 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/B5525419D023FFF3FF7BF9DFFDB3FDCD doi:10.11646/zootaxa.4329.4.3 http://zenodo.org/record/1003014 http://publication.plazi.org/id/496B2C61D020FFF7FFECFFDFFF9BFFD5 doi:10.5281/zenodo.1003018 http://zoobank.org/A0552Ffb-Fe2B-4Fad-809A-A1274Ac86Bcc doi:10.5281/zenodo.6009540 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6009541 https://doi.org/10.5281/zenodo.6009541 oai:zenodo.org:6009541 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard, pp. 351-374 in Zootaxa 4329(4) 354-355 Biodiversity Taxonomy Animalia Mollusca Gastropoda Pectinodontidae Pectinodonta Pectinodonta borealis info:eu-repo/semantics/other publication-taxonomictreatment 2017 ftzenodo https://doi.org/10.5281/zenodo.600954110.11646/zootaxa.4329.4.310.5281/zenodo.100301810.5281/zenodo.6009540 2023-03-10T18:44:12Z ? Pectinodonta borealis sp. nov. (Fig. 3D–H) 2015 Acmaeidae gen. et sp. indet.; Hryniewicz et al. 2015a, table 1. Diagnosis: Surface covered with thick commarginal ribs. Aperture elongated, oval. Apex slightly subcentral. Holotype: PMO 217.516, H = 1.8 mm, L = 4.1 mm, W = 3.3 mm. Type locality and age: Seep #9, Sassenfjorden, Svalbard; late Berriasian, Early Cretaceous. Other material: Two additional specimens (one illustrated PMO 224.752) from the type locality. Description. Protoconch not preserved. Shell patelliform, elongate, oval; width is 81% of length. Apex moderately high, heavily eroded, situated slightly subcentrally; height is 43% of length. Shell exterior covered with thick concentric ribs. Radial ornament very weak, consisting of straight and faint radial riblets. Apertural margin straight in lateral view. Muscle scars not visible. Remarks. The concept of genera in Pectinodontidae is based mainly on radular characters (Sasaki et al. 2003). A slight difference in the apex position delimits, though tenuously, the shells of Pectinodonta and Bathyacmaea. The Sassenfjorden limpet has a slightly subcentral apex, so we decided to place it, though with hesitation, in Pectinodonta. The most similar species to? Pectinodonta borealis sp. nov. is Pectinodonta waitemata Marshall, 1985, from Miocene flysch deposits with plant and wood material from New Zealand. Pectinodonta waitemata also has strong concentric ridges and faint radial ornament; however, its apex is positioned much more eccentrically. The Oligocene Pectinodonta palaeoxylodia Lindberg & Hedegaard, 1996 from a wood-fall in Washington State, USA differs in having a stronger radial ornament than commarginal (Lindberg & Hedegaard 1996). Distribution. Type locality only. Etymology. Northern in Latin. Published as part of Nakrem, Hans Arne, 2017, Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard, pp. 351-374 in Zootaxa 4329 (4) on pages 354-355, DOI:10.11646/zootaxa.4329.4.3, ... Other/Unknown Material Sassenfjord* Sassenfjorden Svalbard Spitsbergen Zenodo New Zealand Sassenfjorden ENVELOPE(16.217,16.217,78.412,78.412) Svalbard |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Pectinodontidae Pectinodonta Pectinodonta borealis |
spellingShingle |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Pectinodontidae Pectinodonta Pectinodonta borealis Nakrem, Hans Arne Pectinodonta borealis Nakrem 2017, sp. nov. |
topic_facet |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Pectinodontidae Pectinodonta Pectinodonta borealis |
description |
? Pectinodonta borealis sp. nov. (Fig. 3D–H) 2015 Acmaeidae gen. et sp. indet.; Hryniewicz et al. 2015a, table 1. Diagnosis: Surface covered with thick commarginal ribs. Aperture elongated, oval. Apex slightly subcentral. Holotype: PMO 217.516, H = 1.8 mm, L = 4.1 mm, W = 3.3 mm. Type locality and age: Seep #9, Sassenfjorden, Svalbard; late Berriasian, Early Cretaceous. Other material: Two additional specimens (one illustrated PMO 224.752) from the type locality. Description. Protoconch not preserved. Shell patelliform, elongate, oval; width is 81% of length. Apex moderately high, heavily eroded, situated slightly subcentrally; height is 43% of length. Shell exterior covered with thick concentric ribs. Radial ornament very weak, consisting of straight and faint radial riblets. Apertural margin straight in lateral view. Muscle scars not visible. Remarks. The concept of genera in Pectinodontidae is based mainly on radular characters (Sasaki et al. 2003). A slight difference in the apex position delimits, though tenuously, the shells of Pectinodonta and Bathyacmaea. The Sassenfjorden limpet has a slightly subcentral apex, so we decided to place it, though with hesitation, in Pectinodonta. The most similar species to? Pectinodonta borealis sp. nov. is Pectinodonta waitemata Marshall, 1985, from Miocene flysch deposits with plant and wood material from New Zealand. Pectinodonta waitemata also has strong concentric ridges and faint radial ornament; however, its apex is positioned much more eccentrically. The Oligocene Pectinodonta palaeoxylodia Lindberg & Hedegaard, 1996 from a wood-fall in Washington State, USA differs in having a stronger radial ornament than commarginal (Lindberg & Hedegaard 1996). Distribution. Type locality only. Etymology. Northern in Latin. Published as part of Nakrem, Hans Arne, 2017, Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard, pp. 351-374 in Zootaxa 4329 (4) on pages 354-355, DOI:10.11646/zootaxa.4329.4.3, ... |
format |
Other/Unknown Material |
author |
Nakrem, Hans Arne |
author_facet |
Nakrem, Hans Arne |
author_sort |
Nakrem, Hans Arne |
title |
Pectinodonta borealis Nakrem 2017, sp. nov. |
title_short |
Pectinodonta borealis Nakrem 2017, sp. nov. |
title_full |
Pectinodonta borealis Nakrem 2017, sp. nov. |
title_fullStr |
Pectinodonta borealis Nakrem 2017, sp. nov. |
title_full_unstemmed |
Pectinodonta borealis Nakrem 2017, sp. nov. |
title_sort |
pectinodonta borealis nakrem 2017, sp. nov. |
publishDate |
2017 |
url |
https://zenodo.org/record/6009541 https://doi.org/10.5281/zenodo.6009541 |
long_lat |
ENVELOPE(16.217,16.217,78.412,78.412) |
geographic |
New Zealand Sassenfjorden Svalbard |
geographic_facet |
New Zealand Sassenfjorden Svalbard |
genre |
Sassenfjord* Sassenfjorden Svalbard Spitsbergen |
genre_facet |
Sassenfjord* Sassenfjorden Svalbard Spitsbergen |
op_source |
Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard, pp. 351-374 in Zootaxa 4329(4) 354-355 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/B5525419D023FFF3FF7BF9DFFDB3FDCD doi:10.11646/zootaxa.4329.4.3 http://zenodo.org/record/1003014 http://publication.plazi.org/id/496B2C61D020FFF7FFECFFDFFF9BFFD5 doi:10.5281/zenodo.1003018 http://zoobank.org/A0552Ffb-Fe2B-4Fad-809A-A1274Ac86Bcc doi:10.5281/zenodo.6009540 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6009541 https://doi.org/10.5281/zenodo.6009541 oai:zenodo.org:6009541 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.600954110.11646/zootaxa.4329.4.310.5281/zenodo.100301810.5281/zenodo.6009540 |
_version_ |
1766188149328838656 |